refactor: init command

[Codelax]

Prepare for #2792
Only thing that has changed currently is the order and the override message, we still ask for the same inputs.

Enter a valid secret-key: <secret-key>

Enter a valid access-key: <access-key>

Choose your default organization ID: <orgID>

Default project ID: <projID>

To improve this tool we rely on diagnostic and usage data.
Sending such data is optional and can be disabled at any time by running "scw config set send-telemetry=false".
Do you want to send usage statistics and diagnostics? (Y/n): n

To fully enjoy Scaleway CLI we recommend you install autocomplete support in your shell.
Do you want to install autocomplete? (Y/n): n
Creating new config
Config saved at /home/julescasteran/.config/scw/config.yaml:
access_key: <access-key>
secret_key: <secret-key>
default_organization_id: <orgID>
default_project_id: <projID>
default_region: fr-par
default_zone: fr-par-1


Looks like your local SSH key ~/.ssh/id_rsa.pub is already present in your Scaleway account.

✅ Initialization completed with success.